Method _dispatchSubcommand

lib/command.js:1364–1383

* @private

(commandName, operands, unknown)

   */

  _dispatchSubcommand(commandName, operands, unknown) {
    const subCommand = this._findCommand(commandName);
    if (!subCommand) this.help({ error: true });

    subCommand._prepareForParse();
    let promiseChain;
    promiseChain = this._chainOrCallSubCommandHook(
      promiseChain,
      subCommand,
      'preSubcommand',
    );
    promiseChain = this._chainOrCall(promiseChain, () => {
      if (subCommand._executableHandler) {
        this._executeSubCommand(subCommand, operands.concat(unknown));
      } else {
        return subCommand._parseCommand(operands, unknown);
      }
    });
    return promiseChain;
  }

  /**
   * Invoke help directly if possible, or dispatch if necessary.